Saw this on YouTube earlier. Could have also been titled: How to block a spray arm - using 100 ping pong balls. If anything, they should have either put the cutlery tray in the bottom rack or put the balls in a clothes washer.
But what can you expect from self-proclaimed "experts" who say that the tilted drum on the newest LG front loaders were a rare convince, otherwise only found on commercial washers. Huh?